United States 83V137000
Mercedes-Benz USA, LLC
The problem
BRAKES MAY REQUIRE EXCESSIVE TIME TO RELEASE AFTER BRAKE APPLICATION. A SECOND DEFECT IS REDUCED HOLDING POWER OF THE PARKING/EMERGENCY BRAKES DUE TO ENTRY OF WATER IN THE REAR BRAKE CHAMBERS. EXCESSIVE RELEASE TIME DOES NOT COMPLY WITH FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 121, "AIR BRAKE SYSTEMS".
What owners should do
DEALER WILL MODIFY THE VEHICLE BY INSTALLING A QUICK RELEASE VALVE IN THE BRAKE AIR SYSTEM AND BY SUBSTITUTION OF A STIFFER BRAKE PEDAL RETURN SPRING. REAR BRAKE CHAMBERS WILL BE EXCHANGED OR MODIFIED, DEPENDING ON THE CHAMBER MAKE, TO PREVENT WATER ENTRY.
Units 300